The 1200G is even better than sp10mk2/3 according to specs
You might want to read those specs again. Rumble 78dB vs. 92dB IEC 98A Weighted and W&F 0.025 vs 0.015 WRMS JIS C5521, both in favor of the MK3.
Technics 1200 Critic Fremer Praises the newer 1200G
Michael Fremer the critic of older Technics 1200s praises the newer 1200g
https://www.analogplanet.com/content/technics-direct-drive-sl-1200g-turntable
https://www.analogplanet.com/content/technics-direct-drive-sl-1200g-turntable